Need help! What is the best way to introduce myself to the venues and wedding planners and how to ask them o be on they're preferred vendor list?

Need help!

I am a beginner here. I need to start introducing my business to the local venues, churches and wedding professionals. My website is almost ready and I have to work out some kind of strategy. So what is the best way to introduce my business to the venues and wedding planners and how to ask them to be on they're preferred vendor list? I am a founder of a string ensemble Carolina Royal Strings, music for wedding ceremonies, cocktail hour receptions. 

Any help would much appreciated.

Thank you

Oksana

www.carolijaroyalstrings.com